90 lines
2.4 KiB
C++
90 lines
2.4 KiB
C++
// -*- C++ -*-
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
#ifndef SUPPORT_VARIANT_TEST_HELPERS_H
|
|
#define SUPPORT_VARIANT_TEST_HELPERS_H
|
|
|
|
#include <type_traits>
|
|
#include <utility>
|
|
#include <cassert>
|
|
|
|
#include "test_macros.h"
|
|
|
|
#if TEST_STD_VER <= 14
|
|
#error This file requires C++17
|
|
#endif
|
|
|
|
// FIXME: Currently the variant<T&> tests are disabled using this macro.
|
|
#define TEST_VARIANT_HAS_NO_REFERENCES
|
|
#ifdef _LIBCPP_ENABLE_NARROWING_CONVERSIONS_IN_VARIANT
|
|
# define TEST_VARIANT_ALLOWS_NARROWING_CONVERSIONS
|
|
#endif
|
|
|
|
#ifdef TEST_VARIANT_ALLOWS_NARROWING_CONVERSIONS
|
|
constexpr bool VariantAllowsNarrowingConversions = true;
|
|
#else
|
|
constexpr bool VariantAllowsNarrowingConversions = false;
|
|
#endif
|
|
|
|
#ifndef TEST_HAS_NO_EXCEPTIONS
|
|
struct CopyThrows {
|
|
CopyThrows() = default;
|
|
CopyThrows(CopyThrows const&) { throw 42; }
|
|
CopyThrows& operator=(CopyThrows const&) { throw 42; }
|
|
};
|
|
|
|
struct MoveThrows {
|
|
static int alive;
|
|
MoveThrows() { ++alive; }
|
|
MoveThrows(MoveThrows const&) {++alive;}
|
|
MoveThrows(MoveThrows&&) { throw 42; }
|
|
MoveThrows& operator=(MoveThrows const&) { return *this; }
|
|
MoveThrows& operator=(MoveThrows&&) { throw 42; }
|
|
~MoveThrows() { --alive; }
|
|
};
|
|
|
|
int MoveThrows::alive = 0;
|
|
|
|
struct MakeEmptyT {
|
|
static int alive;
|
|
MakeEmptyT() { ++alive; }
|
|
MakeEmptyT(MakeEmptyT const&) {
|
|
++alive;
|
|
// Don't throw from the copy constructor since variant's assignment
|
|
// operator performs a copy before committing to the assignment.
|
|
}
|
|
MakeEmptyT(MakeEmptyT &&) {
|
|
throw 42;
|
|
}
|
|
MakeEmptyT& operator=(MakeEmptyT const&) {
|
|
throw 42;
|
|
}
|
|
MakeEmptyT& operator=(MakeEmptyT&&) {
|
|
throw 42;
|
|
}
|
|
~MakeEmptyT() { --alive; }
|
|
};
|
|
static_assert(std::is_swappable_v<MakeEmptyT>, ""); // required for test
|
|
|
|
int MakeEmptyT::alive = 0;
|
|
|
|
template <class Variant>
|
|
void makeEmpty(Variant& v) {
|
|
Variant v2(std::in_place_type<MakeEmptyT>);
|
|
try {
|
|
v = std::move(v2);
|
|
assert(false);
|
|
} catch (...) {
|
|
assert(v.valueless_by_exception());
|
|
}
|
|
}
|
|
#endif // TEST_HAS_NO_EXCEPTIONS
|
|
|
|
|
|
#endif // SUPPORT_VARIANT_TEST_HELPERS_H
|